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arXiv 1104.5095gr-qchep-th
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弯曲背景下标量场的Poincare-Cartan形式

Poincare-Cartan form for scalar fields in curved background

Pankaj Sharan

摘要:

标量场的Poincare-Cartan形式被构造为“直接哈密顿”形式中的微分4-形式,该形式不使用拉格朗日量。标量场$ϕ$的正则动量$p$是1-形式,而庞加莱-嘉当4-形式$Θ$是$(*p)\ww dϕ-H$,其中哈密顿量$H$是由$ϕ$和$p$使用由背景时空的黎曼度规定义的霍奇星算符构成的合适的4-形式。允许的场配置是9维扩展相空间中的4维表面,使得其切向量零化$Ω=-dΘ$。给出了它与变分原理、对称场和守恒量的关系。观测量被定义为从场和动量中构造的微分4-形式,用适当的测试函数涂抹。Peierls很久以前定义的括号被发现是合适的候选人的量化。

英文摘要:

Poincare-Cartan form for scalar field is constructed as a differential 4-form in a `directly Hamiltonian' formalism which does not use a Lagrangian. The canonical momentum $p$ of a scalar field $ϕ$ is a 1-form and the Poincare-Cartan 4-form $Θ$ is $(*p)\ww dϕ-H$ where the Hamiltonian $H$ is a suitable 4-form made from $ϕ$ and $p$ using the Hodge star operator defined by the Riemannian metric of the background spacetime. An allowed field configuration is a 4-dimensional surface in the 9-dimensional extended phase space such that its tangent vectors annihilate $Ω=-dΘ$. Relation of this to variational principle, symmetry fields and conserved quantities is worked out. Observables are defined as differential 4-forms constructed from field and momenta smeared with appropriate test functions. A bracket defined by Peierls long ago is found to be the suitable candidate for quantization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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